Your browser doesn't support javascript.
loading
Show: 20 | 50 | 100
Results 1 - 20 de 47
Filter
1.
Asian Journal of Andrology ; (6): 332-336, 2019.
Article in English | WPRIM | ID: wpr-1009679

ABSTRACT

Inhibin B is a gonadal hormone that downregulates the pituitary production of follicle-stimulating hormone (FSH). In recent years, inhibin B has proved to be an excellent marker of spermatogenesis and even a predictive factor for the recovery of fertility in patients undergoing orchiectomy and antineoplastic treatments. We propose to study inhibin B levels in orchiectomised testicular cancer patients, in order to identify a minimum value representative of normal semen quality. This retrospective study evaluates hormonal and semen parameters of 290 normozoospermic patients attending the Laboratory of Seminology - Sperm Bank "Loredana Gandini" (Rome, Italy) for cryopreservation of seminal fluid following a diagnosis of testicular cancer (TC group) and 117 healthy, normozoospermic men as a control group (CTR group). The percentile distribution of gonadotropin and inhibin B values in the TC and CTR groups was analyzed. There was a statistically significant difference between the two groups in the levels of all hormones (P ≤ 0.001) and in all semen parameters (P < 0.05). About 20% of TC patients revealed inhibin B levels below the 5th percentile of CTR group, despite normozoospermia, and 31.4% had normal spermatogenesis in the presence of FSH values >95th percentile of CTR group. Orchiectomised patients for testicular cancer presented inhibin B levels lower than healthy patients, despite normozoospermia. Our study revealed the poor sensitivity of the current inhibin B reference range when applied to monorchidic patients, suggesting the need to establish more representative ranges to enable more appropriate counseling in relation to the patient's new endocrine condition.


Subject(s)
Adult , Humans , Male , Young Adult , Gonadotropins/blood , Inhibins/blood , Orchiectomy , Reference Values , Testicular Neoplasms/surgery , Testosterone/blood
2.
Asian Journal of Andrology ; (6): 319-323, 2018.
Article in English | WPRIM | ID: wpr-1009591

ABSTRACT

Pulsatile gonadotropin-releasing hormone (GnRH) may induce spermatogenesis in most patients with congenital hypogonadotropic hypogonadism (CHH) by stimulating gonadotropin production, while the predictors for a pituitary response to pulsatile GnRH therapy were rarely investigated. Therefore, the aim of our study is to investigate predictors of the pituitary response to pulsatile GnRH therapy. This retrospective cohort study included 82 CHH patients who received subcutaneous pulsatile GnRH therapy for at least 1 month. Patients were categorized into poor or normal luteinizing hormone (LH) response subgroups according to their LH level (LH <2 IU l-1 or LH ≥2 IU l-1) 1 month into pulsatile GnRH therapy. Gonadotropin and testosterone levels, testicular size, and sperm count were compared between the two subgroups before and after GnRH therapy. Among all patients, LH increased from 0.4 ± 0.5 IU l-1 to 7.5 ± 4.4 IU l-1 and follicle-stimulating hormone (FSH) increased from 1.1 ± 0.9 IU l-1 to 8.8 ± 5.3 IU l-1. A Cox regression analysis showed that basal testosterone level (β = 0.252, P = 0.029) and triptorelin-stimulated FSH60min(β = 0.518, P = 0.01) were two favorable predictors for pituitary response to GnRH therapy. Nine patients (9/82, 11.0%) with low LH response to GnRH therapy were classified into the poor LH response subgroup. After pulsatile GnRH therapy, total serum testosterone level was 39 ± 28 ng dl-1 versus 248 ± 158 ng dl-1 (P = 0.001), and testicular size was 4.0 ± 3.1 ml versus 7.9 ± 4.5 ml (P = 0.005) in the poor and normal LH response subgroups, respectively. It is concluded that higher levels of triptorelin-stimulated FSH60minand basal total serum testosterone are favorable predictors of pituitary LH response to GnRH therapy.


Subject(s)
Adult , Humans , Male , Young Adult , Cohort Studies , Follicle Stimulating Hormone/blood , Gonadotropin-Releasing Hormone/therapeutic use , Gonadotropins/blood , History, 16th Century , Hypogonadism/pathology , Luteinizing Hormone/blood , Pituitary Gland/pathology , Predictive Value of Tests , Retrospective Studies , Sperm Count , Testis/pathology , Testosterone/blood , Treatment Outcome , Triptorelin Pamoate/therapeutic use
3.
Int. j. morphol ; 35(4): 1473-1481, Dec. 2017. tab, graf
Article in English | LILACS | ID: biblio-893159

ABSTRACT

SUMMARY: Special features of nanoparticles have resulted in their widespread use. Small molybdenum trioxide (MoO 3) nanoparticles can translocate from the entry portals into the circulatory and lymphatic systems and ultimately to body tissues and organs depending on their composition and size. In this research, sixty Wistar rats weighting 180-250 g were divided into 6 groups (n=10) randomly: Group 1 (Control) did not receive any medicine. Group 2 (Sham) received intraperitoneal normal saline for 35 days on a daily basis. Groups 3, 4, 5 and 6 received 50, 100, 200, and 300 mg/kg MoO3, respectively, the same way in the sham group and at the same interval. At the end of the experiment, the rats were weighted again and anesthetised. Then blood samples were taken from their hearts to determine the serum levels of estrogen, progesterone, and gonadotropins. Their ovaries were removed and ovarian volume, follicular diameter, number of each follicle type, and oocyte volume were determined. Results indicated that MoO3 nanoparticles strongly reduced body and ovarian weights in the rats. Moreover, a significant decrease was observed in ovarian volume, the number of follicle types, oocyte volume and follicular diameter. The nanoparticles increased the number of atretic follicles via ovarian tissue structure. MoO3 nanoparticles decreased serum estrogen level and increased serum level of FSH that was associated with disruption in the regulation of progesterone and LH secretion. The findings showed that MoO3 nanoparticles could bear negative effects on ovarian structure and function.


RESUMEN: Las características específicas de las nanopartículas han dado lugar a su uso generalizado. Las pequeñas nanopartículas de trióxido de molibdeno (MoO3) pueden penetrar los sistemas circulatorios y linfáticos y, en última instancia, dependiendo de su composición y tamaño, también los tejidos y órganos del cuerpo. En esta investigación se dividieron 60 ratas Wistar con un peso de 180-250 g en 6 grupos (n = 10) aleatoriamente: el Grupo 1 (Control) no recibió ningún medicamento. El Grupo 2 (Sham) recibió solución salina normal intraperitoneal durante 35 días diariamente. Los grupos 3, 4, 5 y 6 recibieron 50, 100, 200 y 300 mg / kg de MoO3 respectivamente, de la misma manera en el grupo simulado, y en el mismo intervalo. Concluyendo el experimento, las ratas se pesaron nuevamente y fueron anestesiadas. Luego se tomaron muestras de sangre de los corazones para determinar los niveles séricos de estrógeno, progesterona y gonadotropinas. Se retiraron los ovarios y se determinó el volumen ovárico, el diámetro folicular, el número de cada tipo de folículo y el volumen de ovocitos. Los resultados indicaron que las nanopartículas de MoO3 redujeron significativamente los pesos corporal y ovárico en las ratas. Además, se observó una disminución importante en el volumen ovárico, el número de tipos de folículos, el volumen de ovocitos y el diámetro folicular. Las nanopartículas aumentaron el número de folículos auriculares a través de la estructura del tejido ovárico. Las nanopartículas de MoO 3 disminuyeron el nivel sérico de estrógeno y aumentaron el nivel sérico de FSH que se asoció con la interrupción en la regulación de la progesterona y la secreción de LH. Los hallazgos mostraron que las nanopartículas de MoO 3 podrían tener efectos negativos sobre la estructura y la función ovárica.


Subject(s)
Animals , Female , Rats , Molybdenum/administration & dosage , Nanoparticles , Ovarian Follicle/drug effects , Oxygen/administration & dosage , Estrogens/blood , Gonadotropins/blood , Microscopy, Electron , Organ Size/drug effects , Ovary/drug effects , Ovary/ultrastructure , Progesterone/blood , Rats, Wistar
4.
Arch. endocrinol. metab. (Online) ; 61(2): 145-151, Mar.-Apr. 2017. tab
Article in English | LILACS | ID: biblio-838430

ABSTRACT

ABSTRACT Objective To investigate the effect of gonadotropin, sex hormone levels and insulin resistance (IR) on thyroid functions and thyroid volume (TV) in polycystic ovary syndrome (PCOS). Subjects and methods 69 new diagnosed PCOS patients (age 24.82 ± 6.17) and 56 healthy control female (age 26.69 ± 5.25) were involved to the study. Fasting plasma glucose, lipid profile, insulin, thyroid stimulating hormone (TSH), free thyroxine (fT4), estradiol (E2), luteinizing hormone (LH), follicle stimulating hormone levels and urine iodine were measured in all participants. Thyroid and pelvic ultrasound were performed in all participants. Results Insulin, HOMA-IR, LH, E2 and TV were higher in PCOS group (p < 0.05). TV was significantly higher in PCOS patients with IR compared to non-IR PCOS patients (p < 0.001), while TSH, fT4, and urine iodine levels were similar between these groups (p > 0.05). There was a negative correlation between E2 and TSH (p < 0.05) and a positive correlation between TSH and TV (p < 0.05). There was a significant positive correlation between TV and LH, insulin, HOMA-IR (p < 0.05). Conclusion This study showed that TV was increased in patients with insulin resistance but differences in TSH and LH levels may affect TV changes as well.


Subject(s)
Humans , Female , Adolescent , Adult , Young Adult , Polycystic Ovary Syndrome/physiopathology , Polycystic Ovary Syndrome/metabolism , Thyroid Gland/physiopathology , Thyroid Gland/metabolism , Thyroid Gland/pathology , Insulin Resistance/physiology , Gonadotropins/blood , Organ Size , Reference Values , Thyroid Diseases/physiopathology , Thyroid Diseases/blood , Body Mass Index , Case-Control Studies , Prospective Studies , Ultrasonography , Statistics, Nonparametric
5.
Arq. bras. endocrinol. metab ; 58(1): 68-75, 02/2014. tab, graf
Article in English | LILACS | ID: lil-705248

ABSTRACT

Leydig cell tumors are rare ovarian steroid cell neoplasms. More than 75% of patients show signs of virilization due to overproduction of testosterone. We report a case of an 8-year-old woman with progressive signs of virilization, and presenting vaginal bleeding. Clinical analyses revealed high levels of serum testosterone, delta 4-androstenedione and estradiol, and also inappropriate low levels of gonadotrophins for a post-menopausal woman. Transvaginal ultrasound showed no evidence of ovarian tumor, but pelvic and abdominal computerized axial tomography imaging revealed a left ovarian solid nodule, and no evidence of alteration in the adrenal glands. Total hysterectomy and bilateral salpingoophorectomy were performed. Histopathology and immunohistochemistry confirmed the diagnosis of Leydig cell tumor. After surgery, androgen levels returned to normal, and there was regression of the signs of virilization.


Tumores ovarianos de células de Leydig são neoplasias raras de células ovarianas esteroidogênicas. Mais de 75% dos pacientes apresentam sinais de virilização devido à produção excessiva de testosterona. Relatamos aqui o caso de uma mulher de 81 anos de idade com sinais progressivos de virilização e ocorrência de sangramento vaginal. As análises clínicas mostraram altos níveis de testosterona sérica, delta 4-androstenediona e estradiol, além de níveis inadequadamente baixos de gonadotrofinas para uma mulher em pós-menopausa. O ultrassom transvaginal não apresentou evidências de tumor ovariano, mas a tomografia axial computadorizada da região pélvico-abdominal mostrou um nódulo sólido no ovário esquerdo e nenhuma evidência de alteração nas adrenais. Foi feita uma histerectomia total e salpingooforectomia bilateral. Os exames histopatológicos e a imuno-histoquímica confirmaram o diagnóstico de tumor de células de Leydig. Após a cirurgia, os níveis de androgênios voltaram ao normal, e os sinais de virilização regrediram.


Subject(s)
Aged, 80 and over , Female , Humans , Leydig Cell Tumor/complications , Ovarian Neoplasms/complications , Virilism/etiology , Androstenedione/blood , Estradiol/blood , Gonadotropins/blood , Hyperandrogenism/blood , Hyperandrogenism/etiology , Leydig Cell Tumor/blood , Magnetic Resonance Imaging , Ovarian Neoplasms/blood , Postmenopause/blood , Tomography, Emission-Computed , Testosterone/blood , Virilism/blood
7.
Int. j. morphol ; 27(1): 173-182, Mar. 2009. ilus, tab, graf
Article in English | LILACS | ID: lil-553004

ABSTRACT

Ethanol extract of whole plant of Trichosanthes cucumerina L. var. cucumerina was evaluated for antiovulatory activity in adult rats. The ethanol extract at the doses 200 and 400mg/kg body weight (orally) affected the normal estrous cycle showing a significant increase in estrus and metestrus phases and decrease in diestras and proestrus phases. The extract also significantly reduced the number of healthy follicles (Class I-Class VI) and corpora lutea and increased the number of regressing follicles (Stage IA, Stage IB, Stage IIA, and Stage IIB). The protein and glycogen content in the ovaries were significantly reduced in treated rats. The cholesterol level was significantly increased, whereas, the enzyme activities like 3b-HSD and 17b-HSD were significantly inhibited in the ovary of treated rats. Serum FSH and LH levels were significantly reduced in the treated groups were measured by RIA. In acute toxicity test, neither mortality nor change in the behavior or any other physiological activities in mice were observed in the treated groups. In chronic toxicity studies, no mortality was recorded and there were no significant differences in the body and organ weights were observed between controls and treated rats. Hematological analysis showed no significant differences in any of the parameters examined (RBC, WBC count and Hemoglobin estimation). These observations showed the antiovulatory activity of ethanol extract of whole plant of Trichosanthes cucumerina L. var. cucumerina in female albino rats.


El extracto de etanol de toda la planta de Trichosanthes cucumerina var. cucumerina (L.) se evaluó en cuanto a su actividad antiovulatoria en ratas adultas. El extracto de etanol en dosis de 200 y 400mg/kg de peso corporal (oral) afectó el ciclo normal estral, mostrando un aumentó significativo en las fases de estro y metaestro y la disminución de las fases de diestro y proestro. El extracto también redujo significativamente el número de folículos sanos (Clase I=Clase VI) y cuerpo lúteo y aumentó el número de folículos en regresión (etapa I, etapa IB, etapa II y etapa IIB). La proteína y el contenido de glucógeno en los ovarios se redujeron significativamente en las ratas tratadas. El nivel de colesterol aumentó significativamente, mientras que, actividad de las enzimas 3b-HSD y 17b-HSD se inhibió significativamente en el ovario de ratas tratadas. FSH sérico y los niveles de LH se redujeron significativamente en los grupos tratados y medidos por RÍA. En la prueba de toxicidad aguda, no hubo mortalidad ni cambio en el comportamiento fisiológico o de cualquier otra actividad en los grupos tratados de ratas. En estudios de toxicidad crónica, no se registró mortalidad y no hubo diferencias significativas en el peso corporal o el peso de los órganos entre los controles y las ratas tratadas. Los análisis hematológicos no mostraron diferencias significativas en ninguno de los parámetros examinados (eritrocitos, recuento de glóbulos blancos y estimación de hemoglobina). Estas observaciones mostraron la actividad antiovulatoria del extracto de etanol de toda la planta de Trichosanthes cucumerina var. cucumerina en ratas albinas hembras.


Subject(s)
Animals , Female , Rats , Anovulation/chemically induced , Anovulation/veterinary , Trichosanthes/adverse effects , Trichosanthes/chemistry , Trichosanthes/toxicity , Estrous Cycle , Ovarian Follicle , Ovarian Follicle/embryology , Gonadotropins/blood
9.
New Egyptian Journal of Medicine [The]. 2009; 41 (5): 449-458
in English | IMEMR | ID: emr-113087

ABSTRACT

Recombinant human interferon alpha [rh-IFN-alpha] is used therapeutically in malignant disorders and chronic hepatitis. The phenotypic effects of this drug at the structural levels on testicular tissue were hardly ever addressed. Hence, this work was designed in adult male albino mice to study the phenotypic effects of rh-INF-alpha-2b on testicular tissue as well as assessing its effects on serum testosterone and gonadotropins levels. This research was planned to through light on the effects of interferon-alpha-2b [IFN-alpha-2b] on the hypothalamic-pituitary-testicular [HPT] axis of the adult male albino mice. Experimental study. National Hepatology and Tropical Medicine Research Institute [NHTMRI]. The study was conducted from November [2004] to February [2005]. Thirty sexually mature male mice were divided into three groups [10 mice in each group], namely: the control, the experimental and the recovery groups. Mice in the experimental and recovery groups were administered recombinant human interferon alpha intraperitoneally at a dose of 3000 U / mouse weekly for 12 weeks in a volume of 1.0-microliter isotonic normal' saline, then animals in the recovery group were left to recover for a further period of two months. At the end of the experiment, serum concentrations of gonadotropins and testosterone were measured and then all animals were then sacrificed to study histopathologically the possible effects of interferon on the testicular tissue. rh-IFN-alpha-2b induced remarkable decline in the serum levels of both follicle stimulating hormone [FSH] and luteinizing hormone [LH] in mice of the experimental group compared to the corresponding control and mice of recovery group. At the same time, testosterone was moderately increased in the experimental group, and then returned to its normal levels within 2 months after cessation of treatment. Histopathologically, in the experimental group, there were focal thickening of the basement membrane, degenerative changes and clumping of the germinal epithelial cells in the center of seminiferous tubules, partial desquamation of the germinal epithelium from basement membrane, reduction in the germ cell height, partial arrest of maturation and increased number of Sertoli cells. Increased number of leydig's cells and hypervascularity were detected in the interstitial spaces. In the recovery group, there was lessening of the germ cell hypoplasia manifested by restoration of spermatogenic cells and accidental disruption in the basement membrane. Most of the spermatogenic and Sertoli cells restored their polarity, height and maturation. Our results suggest that rh-INF-alpha-2b temporally affects the hypothalamic-pituitary-testicular axis [HPT], both centrally and peripherally [at the testicular level], through the lessening of FSH, LH, raise of testosterone serum levels and direct phenotypic effect on the testicular tissue


Subject(s)
Animals, Laboratory , Reproduction/drug effects , Gonadotropins/blood , Testosterone/blood , Testis/pathology , Follicle Stimulating Hormone/blood , Mice
10.
Armaghane-danesh. 2009; 14 (3): 63-70
in Persian | IMEMR | ID: emr-134545

ABSTRACT

Dorema aucheri [Apieaceae] contains chemical compounds including flavonoids and coumarins. Flavonoids have estrogenic properties and coumarins have antiandrogenic properties. The compounds are very effective on the HPG axis. In the present study, the effect of Dorema aucheri alcoholic extract on LH, FSH, testosterone and DHT hormones on adult male rats were determined. This was an experimental study in which male adult rats were chosen and divided into 5 groups: control group which did not received any extract, sham groups which took distilled water, experimental groups, which orally took 100, 200 and 400 mg per kg of the Dorema aucheri extract for 28 consecutive days. Then the animals were weighed and the blood sample of each group was taken and used for measuring of the serum concentration of FSH, LH, DHT and testosterone. The collected data were analyzed by the SPSS software using ANOVA and t-test. The results revealed no differences in the average weight of the body and concentration of FSH hormone in the experimental group compared with the control and sham group. However significant difference was found between the concentration of LH, testosterone and dihydrotestosterone in the experimental group compared with the rest groups. Concentration of testosterone in the minimum dosage of extracts showed significant increase while significant decrease was seen in the higher dose. Significant increase was seen in the concentration of LH in all doses. DHT serum concentration in the minimum dose showed significant decrease while significant increase was seen in higher dosage. It seems that the flavonoids compound of Dorema aucheri extract caused the LH hormone to increase prolactin. Using the extract increases the LH hormone and inhibition of aromatase and 5 alfa reductase enzymes cause the testosterone and DHT hormone to increase in higher dosage


Subject(s)
Male , Animals, Laboratory , Plant Extracts , Gonadotropins/blood , Androgens/blood , Rats/blood , Luteinizing Hormone/blood , Follicle Stimulating Hormone/blood , Testosterone/blood , Dihydrotestosterone/blood
11.
Annals of Saudi Medicine. 2008; 28 (3): 174-178
in English | IMEMR | ID: emr-85734

ABSTRACT

Benign prostatic hyperplasia [BPH] develops in elderly males when serum androgens are relatively lower than in healthy younger males, but it is not well understood whether and how sex steroids are altered in prostatic hyperplasia. It is also uncertain whether there is any change in sex steroid levels in males older than 40 years of age. The use of androgens in elderly males is often discouraged because of the probable worsening effect of androgens on prostatism. This study aimed to determine the relationship between prostatic hyperplasia and sex steroid levels and whether there is any significant change in these hormones after the age of 40 years. We studied healthy males of age 240 years with [n=92] or without [n=93] clinical prostatic hyperplasia. Serum testosterone, estradiol, gonadotrophins and sex hormone-binding globulin [SHBG] were compared. The hormones and SHBG were also correlated with age. No significant difference was found in any hormone in cases with prostatic hyperplasia as compared with the controls. There was no significant age-related change in any hormone except estradiol where as a negative correlation [P<.003] with age was found. Serum sex steroids and SHBG remained unchanged in symptomatic prostatic hyperplasia and except for estradiol there was no significant age-related change in serum testosterone, gonadotrophins and SHBG in healthy males after the fourth decade. More studies are needed to confirm the age-related decline of estrogens in males


Subject(s)
Humans , Male , Sex Hormone-Binding Globulin , Gonadal Steroid Hormones/blood , Gonadotropins/blood , Testosterone/blood , Estradiol/blood
12.
Iranian Journal of Fertility and Sterility. 2007; 1 (2): 55-62
in English | IMEMR | ID: emr-82920

ABSTRACT

Levels of serum gonadotropins have direct effects on testicular functions and spermatogenesis. Assessment of levels of serum gonadotropins from fathered subjects and infertile patients indicates wide range diversity. In this study, we tried to find out whether the levels of seminal FSH and LH affect the parameters of seminal fluid analysis [SFA] and if there is any correlation between levels of serum FSH and LH in healthy men and infertile patients. Levels of FSH and LH in serum and seminal plasma were assessed randomly, in addition to examination of seminal fluid analysis from 12 normozoospermic subjects [age range: 33-56 years] and 66 infertile patients [age range: 20-62 years] with duration of infertility [15-201 months]. Macroscopic and microscopic parameters of semen specimens were determined. Data were statistically analyzed using multiple correlation and regression, and MANOVA tests. Result of the present study observed significant positive correlation between FSH levels in serum and seminal plasma [r=0.984; p<0.001] of normozoospermic subjects as compared to other groups of infertile patients. No correlations were noticed between LH levels in serum and seminal plasma of normozoospermic subjects and groups of infertile patients. Significant and positive correlation was assessed between sperm concentration and levels of seminal FSH [r=0.822; p<0.05 and r=0.940; p<0.01] and seminal LH [r=0.989; p<0.001 and r=0.999; p<0.001] of asthenozoospermic and OAT patients respectively. In asthenozoospermic patients, significant and positive correlations were observed between seminal FSH and percentages of sperm motility, progressive motility, sperm normal morphology and total progressive motile sperm/ejaculate. This study shows a strong association and effect between seminal FSH and serum FSH and parameters of SFA for normozoospermic men and different groups of infertile patients. These finding may call for large cohorts being executed with larger population of patients that is required for this analysis to be more accurate


Subject(s)
Humans , Male , Gonadotropins/blood , Semen/chemistry , Semen/cytology
13.
Journal of Shaheed Sadoughi University of Medical Sciences and Health Services. 2006; 14 (3): 56-61
in Persian | IMEMR | ID: emr-78173

ABSTRACT

The aim of this study was to evaluate the correlation between serum levels of ovarian and gonadotropin hormones, age and number of follicles with follicular alkaline and acid phosphatase activity in infertile women under controlled ovarian hyperstimulation. After collection of follicular fluid and calculation of the number of follicles, the specific activity of alkaline [ALP] and acid phosphatase [ACP] was determined according to the total protein in 19 women at the time of puncture. Also at that time, the levels of progesterone, estradiol, and follicle stimulating hormone [FSH] and leuteinizing hormone [LH] of their sera were measured. The correlation of follicular ALP and ACP with each serum hormone levels, women age and number of follicles was calculated using non-parametric analysis. The ALP has a correlation with progesterone [P=0.01] levels but doesn't have any correlation with the other factors. However, the ACP activity has a correlation not only with follicular number but also with estradiol and progesterone levels [P=0.05]. Thus ACP activity is more affected by ovarian hormone than ALP and it can affect the ovarian microenvironment and oocyte development


Subject(s)
Humans , Female , Alkaline Phosphatase , Follicular Fluid , Estradiol/blood , Progesterone/blood , Follicle Stimulating Hormone/blood , Luteinizing Hormone/blood , Gonadotropins/blood , Ovarian Follicle , Infertility, Female
14.
Indian J Exp Biol ; 2005 Mar; 43(3): 224-32
Article in English | IMSEAR | ID: sea-55920

ABSTRACT

Effects of daily administration of melatonin for 15 days were evaluated with respect to ovarian activities and plasma gonadotropin (GtH II) and vitellogenin (Vg) levels in intact (INT) and pinealectomized (Px) female catfish, C. batrachus, during preparatory (April), prespawning (May and June), spawning (July) and post-spawning (September) periods. Px (saline control groups) caused a stimulatory effect during preparatory (with respect to Vg synthesis and incorporation) and prespawning (with respect to Vg synthesis) periods whereas no effect was observed during spawning and post-spawning periods with respect to the reproductive parameters studied. During April, melatonin-treatment significantly decreased plasma GtH II levels and percentage of vitellogenic oocytes without any significant changes in plasma Vg levels and gonadosomatic index (GSI). During early prespawning period, in May, 50microg melatonin brought about a significant reduction in plasma GtH II levels in INT group, whereas 100microg caused a decrease in all parameters; on the other hand, in Px groups both dose levels proved to be inhibitory. In June (late prespawning period) melatonin-treatment could not bring about any change in GSI and plasma Vg levels compared to the control groups regardless of Px but plasma GtH II and mean number of yolky oocytes were significantly reduced in melatonin-treated INT group. During spawning period (July) melatonin inhibited the GSI, mean number of yolky oocytes and plasma GtH II levels without affecting plasma Vg levels. In September (post-spawning period), melatonin did inhibit both GSI and plasma GtH II levels. The results, thus, indicate that melatonin showed variable effects (inhibitory and/or no effect) to GSI, mean number of yolky oocytes and plasma Vg levels but a consistent inhibiton of plasma GtH II levels indicating that melatonin may control the reproduction by blocking the GtH II release from the pituitary via affecting the hypothalamo-hypophysial axis.


Subject(s)
Animals , Catfishes , Enzyme-Linked Immunosorbent Assay , Female , Gonadotropins/blood , Hypothalamo-Hypophyseal System/physiology , Melatonin/pharmacology , Organ Size , Ovary/drug effects , Pineal Gland/physiology , Reproduction , Seasons , Temperature , Time Factors , Vitellogenins/blood
15.
PJMR-Pakistan Journal of Medical Research. 2005; 44 (1): 19-22
in English | IMEMR | ID: emr-74321

ABSTRACT

This study was designed to determine the levels of serum LH and FSH, along with their ratios, among men with varying sperm quality. One hundred fifty married men, presenting with a complaint of infertility, which had been evaluated for their seminal profile, and had been classified as azoospermic [50], oligozoospermic [50], asthenozoospermic [20] and normozoospermic [30] were studied for the analysis of serum LH, FSH, levels using Enzyme Immuno Assay [EIA]. Data were compared using student "t-test. The FSH and LH level indicated inverse/negative correlation to sperm concentration. The mean FSH and LH levels for the groups were 22.92 +/- 4.15 and 13.85 +/- 2.33 [Azoospermia], 16.82 +/- 3.79 and 10.92 +/- 3.79 [Oligozoospermia], 3.22 +/- 0.61 and 3.92 +/- 1.17 [Asthenozoospermia] while the levels in normozoospermic men were 5.53 +/- 0.52 and 7.40 +/- 0.60. Similarly, the LH/FSH and FSH/LH ratios in the four groups were 0.77 +/- 0.08 and 1.84 +/- 0.22 [Azoospermia], 1.78 +/- 0.41 and 1.47 +/- 0.18 [Oligozoospermia], 1.51 +/- 0.46 and 1.28 +/- 0.28 [Asthenozoospermia] and the respective ratios in normozoospermic men were 1.55 +/- 0.16 and 0.85 +/- 0.10. The present data indicate that disturbance in gonadotropin ratios also causes infertility, since these hormones act synergistically.


Subject(s)
Humans , Male , Follicle Stimulating Hormone/blood , Luteinizing Hormone/blood , Gonadotropins/blood , Sperm Count , Quality Control
16.
Indian Pediatr ; 2003 Jan; 40(1): 29-35
Article in English | IMSEAR | ID: sea-6825

ABSTRACT

McCune Albright Syndrome (MCAS) is an association of, Café-au-lait macules, polyostotic fibrous dysplasia and autonomous hyperfunctioning endocrinopathy. This is a rare disorder seen more commonly in females. We evaluated 7 (6F & 1M) cases under six years of age (4 months to 5.5 yrs) presenting with Café-au-lait spots, polyostotic fibrous dysplasia and/or sexual precocity. All the 7 cases had large Café-au-lait spots, radiologic features of polyostotic fibrous dysplasia were seen in 5 cases. Six girls had precocious puberty with large ovarian follicles and elevated S. Estradiol levels (14-65 pg/dl) with prepubertal gonadotropin levels in 5 of them. Medroxy-progrestrone acetate was used to treat the sexual precocity. Five girls on follow up for 6 months (6mo-16mo) showed cessation of menstrual episodes and regression of ovarian follicles in three, regression in breast size in one, and three girls continued to grow at a height velocity >95th centile for age. Skeletal lesions and skin features did not show any change. No other endocrinopathy was noted. Gonadotropin independent precocious puberty was the only endocrine affection seen in this series.


Subject(s)
Cafe-au-Lait Spots/etiology , Child, Preschool , Estradiol/blood , Female , Fibrous Dysplasia, Polyostotic/complications , Gonadotropins/blood , Humans , Infant , Male , Medroxyprogesterone Acetate/therapeutic use , Progesterone Congeners/therapeutic use , Puberty, Precocious/diagnosis , Treatment Outcome
17.
Medical Journal of Cairo University [The]. 2003; 71 (4 Supp. 2): 263-7
in English | IMEMR | ID: emr-63781

ABSTRACT

To evaluate what hormonal and/or biochemical parameters are highly associated with polycystic ovary syndrome [PCOS] in ultrasonically normal and polysticappearing ovary groups. A prospective randomized comparative study El Galaa Maternity Teaching Hospital Patients[s]: Thirty two women fulfilling the entry diagnostic criteria for PCOS were randomly subdivided into two groups-group I [n=16] with ultrasonically normal-appearing ovaries and group II [n=16] with characteristic polycystic ovarian morphology. The two groups were matched for age and body mass index [BMI]. All patients had elevated serum testosterone [T] level between 80 and 150 ng/dL i.e. androgen excess. Insulin infusion for the purpose of performing insulin tolerance testing to evaluate insulin resistance or sensitivity. We measured serum androgens [T, DHEAS and androstenedione], gonadotorophins [FSH and LH], binding proteins [sex hormone-bending globulin SHBG and insulin-like growth factor binding protein-1, IGFBP-1], insulin-like growth factor-1 [IGF-1] and insulin resistance by insulin tolerance testing [ITT]. Serum androgens and binding proteins were not significant different in both groups. Insulin tolerance testing demonstreated a slower glucose disappearance in the polycystic-appearing ovary group. K-itt] glucose was 4.58% +/- 1.4% / min and 2.07% +/- 1.07% min in the normal and polucystic-appearing ovaries group respectively. Women with PCOS and polcystic ovarian morphology do not demonstrate any definitive serum hormonal differences compared with women with PCOS and normal-appearing ovaries. The presence of polycystic-appearing ovaries correlates significantly with the presence of insulin resistance, a findings that highlights the long-term health consequences of the syndrome


Subject(s)
Humans , Female , Testosterone/blood , Gonadotropins/blood , Insulin-Like Growth Factor I , Ultrasonography , Insulin-Like Growth Factor Binding Protein 1 , Insulin Resistance
18.
Braz. j. med. biol. res ; 34(9): 1209-1215, Sept. 2001. tab, graf
Article in English | LILACS | ID: lil-290396

ABSTRACT

The objective of the present study was to examine whether hypothyroidism affects the reproductive system of adult female rats by evaluating ovarian morphology, uterus weight and the changes in serum and pituitary concentrations of prolactin and gonadotropins. Three-month-old female rats were divided into three groups: control (N = 10), hypothyroid (N = 10), treated with 0.05 percent 6-propyl-2-thiouracil (PTU) in drinking water for 60 days, and T4-treated group (N = 10), receiving daily sc injections of L-thyroxine (0.8 æg/100 g body weight) during the last 10 days of the experiment. At the end of 50 days of hypothyroidism no hypothyroid animal showed a regular cycle, while 71 percent of controls as well as the T4-treated rats showed regular cycles. Corpora lutea, growing follicles and mature Graafian follicles were found in all ovaries studied. The corpora lutea were smaller in both the hypothyroid and T4-replaced rats. Graafian follicles were found in 72 percent of controls and only in 34 percent of hypothyroid and 43 percent of T4-treated animals. Serum LH, FSH, progesterone and estradiol concentrations did not differ among the three groups. Serum prolactin concentration and the pituitary content of the three hormones studied were higher in the hypothyroid animals compared to control. T4 treatment restored serum prolactin concentration to the level found in controls, but only partially normalized the pituitary content of gonadotropins and prolactin. In conclusion, the morphological changes caused by hypothyroidism can be a consequence of higher prolactin production that can block the secretion and action of gonadotropins, being the main cause of the changes observed


Subject(s)
Animals , Female , Rats , Hypothyroidism/complications , Infertility, Female/etiology , Ovary/physiopathology , Pituitary Gland/physiopathology , Antithyroid Agents/therapeutic use , Body Weight , Estradiol/blood , Gonadotropins/analysis , Gonadotropins/blood , Gonadotropins/metabolism , Hypothyroidism/drug therapy , Ovary/pathology , Pituitary Gland/pathology , Progesterone/blood , Prolactin/analysis , Prolactin/biosynthesis , Prolactin/blood , Propylthiouracil/therapeutic use , Rats, Wistar , Thyrotropin/blood , Thyroxine/therapeutic use , Uterus/pathology , Uterus/physiopathology
19.
Article in English | IMSEAR | ID: sea-89313

ABSTRACT

AIM: To study the prevalence of insulin resistance (IR) and its sequelae in patients with acanthosis. METHODOLOGY: Thirty six patients (28 females; eight males) with biopsy proven acanthosis nigricans and eight controls were evaluated for insulin sensitivity (IS) by estimating (a) the glucose and insulin responses to a 75 gm glucose load (Oral glucose tolerance test-OGTT), (b) the glucose disposal rate (GDR) during an intravenous insulin tolerance test (ITT). Serum androgen levels (testosterone--Te, androstenedione--ASD, Dehydro-epiandrosterone sulphate--DHEAS) were estimated in the basal state and 60 min after a bolus of insulin. Thyroid function tests (tri-iodo-thyronine--T3, thyroxine--T4, thyroid stimulating hormone--TSH) were performed in all subjects. RESULTS: The acanthotic population, overall had insignificant hyperglycemia (Area under curve of glucose--AUC-G : 17,745.5 +/- 847.5 v/s 11,051.3 +/- 274.5 mg/dl/min) and hyperinsulinemia (Area under curve of insulin -AUC-I: 20,825.2 +/- 1,287.7 v/s 6,340.1 +/- 984.2 microlU/ml/min) compared to controls during OGTT. Eight patients with acanthosis nigricans had impaired glucose tolerance and eight had overt diabetes using WHO criteria. 69.4% of the acanthotic subjects were obese and 13.9% (5/36) were hypertensive. Thyroid dysfunction was present in three (one had hypothyroidism and two had thyrotoxicosis). Reproductive disorders--menstrual irregularity (46.5%), amenorrhea (21.4%), hirsuitism (21.4%) and infertility (3.6%) was encountered in a significant number of acanthotics. Acanthotics overall had statistically higher levels of androgens; Te (females)--0.74 +/- 0.09 v/s 0.27 +/- 0.09 ng/ml (p < 0.005), ASD--1.8 +/- 0.21 v/s 0.94 +/- 0.2 ng/ml (p < 0.005) and DHEAS--1,880.8 +/- 216.3 v/s 772.8 +/- 210.4 ng/ml (p < 0.005). An elevated DHEAS correlated positively to body mass index (BMI) and android obesity. Serum Te levels correlated positively with GDR. Serum insulin levels increased progressively with obesity and acanthosis. Serum insulin was associated with progressive worsening of hyperandrogenism (as seen in non-obese controls, non-obese and obese acanthotics). CONCLUSIONS: Subjects with acanthosis nigricans should be screened for insulin resistance and its clinical and metabolic sequelae. Thyroid dysfunction should be sought in these subjects as it can be easily treated.


Subject(s)
Acanthosis Nigricans/complications , Adult , Androgens/blood , Female , Glucose Tolerance Test , Gonadotropins/blood , Humans , Insulin Resistance , Male , Obesity/complications
20.
Rev. bras. ginecol. obstet ; 20(5): 267-71, jun. 1998. tab
Article in Portuguese | LILACS | ID: lil-236189

ABSTRACT

Objetivo: analisar os níveis dos esteróides sexuais endógenos e gonadotrofinas em mulheres com e sem câncer de endométrio. Métodos: foi realizado estudo clínico-comparativo com 20 mulheres na pós-menopausa com câncer de endométrio e 20 mulheres na pós-menopausa, sem câncer de endométrio. A idade, o tempo de menopausa e o índice de massa corpórea foram utilizados como variáveis de emparelhamento. Os níveis plasmáticos dos esteróides sexuais endógenos froam medidos por métodos de radioimunoensaio e imunoenzimático. Para análise estatística utilizamos o teste "t" de Student. Resultados: os níveis de androstenediona (A), testosterona total (t) e testosterona livre (TL) foram mais elevados nas mulheres com câncer de endométrio e os níveis de hormônio luteinizante (LH) foram significativamente menores nessas mulheres. Também observados que a razão (E1/A) mostrou valores significativamente menores no grupo de mulheres com câncer, ao passo que a razão E2/E1) não apresentou diferenças nos dois grupos. Conclusões: destacamos a potencialidade dos esteróides sexuais e gonadotrofinas na gênese do adenocarcinoma de endométrio em mulheres na pós-menopausa.


Subject(s)
Humans , Female , Middle Aged , Androgens/blood , Estrogens/blood , Gonadotropins/blood , Endometrial Neoplasms/blood , Postmenopause
SELECTION OF CITATIONS
SEARCH DETAIL